40V LED Driver with Temperature Compensation

The ZLED7010, one of our ZLED Family of LED control ICs, is an inductive step-down converter that is optimal for driving a single LED or multiple LEDs (connected in series) from a voltage source greater than the voltage rating of the LED. The ZLED7010 operates in continuous mode. Capable of operating efficiently with voltage supplies ranging from 6 VDC to 40 VDC, it is ideal for low-voltage lighting applications. The ZLED7010 minimizes current consumption by remaining in a low-current standby mode (output is off) until a voltage of ≥0.3V is applied to the ADJI pin. In operating mode, the ZLED7010 can source LEDs with an output current of ≤750mA (≤30 watts of output power) that is externally adjustable. The ZLED7010's integrated output switch and high-side current sensing circuit use an external resistor to adjust the average out-put current. LED control is achieved via an external control signal at the ZLED7010's ADJI pin, implemented as a pulse-width modulation (PWM) waveform for a gated output current or a DC voltage for continuous current. The ZLED7010 provides a temperature compensation function for maintaining stable and reliable LED operation. LED over-temperature conditions are detected via a negative temperature coefficient (NTC) thermistor mounted close to the LEDs. If an over-temperature condition occurs, the NTC value reaches the value of a threshold resistor and the IC reduces LED current automatically. After the circuit recovers to a safe temperature, current returns to the set value. ADJO outputs and ADJI inputs of consecutive ICs can be interconnected as a driver chain deploying the temperature compensation information of the predecessor. This reduces the part count because only the first stage of the series requires an NTC.

Features

  • Capable of 95% efficiency
  • Operates in continuous mode with a wide input range from 6 VDC to 40 VDC
  • Integrated 40V power switch
  • One-pin on/off or brightness control via DC voltage or PWM control signal
  • Switching frequency: ≤1MHz
  • Dimming rate: 1200:1 (typical)
  • Output current accuracy: 5% (typical)
  • Built-in temperature compensation and open-circuit protection for LEDs
  • Thermal shutdown protection for the ZLED7010
  • Very few external components needed for operation
  • Broad range of applications: outputs up to ≤750mA
  • SOP-8 package

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Range Carrier Type Buy Sample
ZLED7010ZI1R Obsolete DCG8 SOIC 8 Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
ZLED7010 Short-form Datasheet Short Form Datasheet PDF 140 KB Apr 19, 2016
ZLED7010 Datasheet Datasheet PDF 894 KB Apr 19, 2016
User Guides & Manuals
ZLED7010KIT-D1 Demo Kit Description Manual PDF 663 KB Apr 25, 2016
PCNs & PDNs
PDN-2017-005-01 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 106 KB Jun 29, 2017
Other
IDT CAD Altium Libraries for AID Products Rev 20160819 PCB Design Files ZIP 1.20 MB Aug 18, 2016

Evaluation Boards